May 20, 2021 WeChat Mini Program Development Document
Update multiple records
The function signature is as follows:
function update(options: object): Promise<Result>
Description of the parameters
| The field name | Type | Required | The default | Description |
|---|---|---|---|---|
| data | Object | Is | Update the object |
Returns a description of the value
The results of Promise's resolve and reject are defined as follows:
| Description of the results | |
|---|---|
| resolve | For the results of the new record, the Result definition is below |
| reject | The reason for the failure |
Result description
The result of the success callback and the result of Promise Resolve result are objects that are structured as follows:
| Field | Type | Description |
|---|---|---|
| stats | Object | Update the statistics for the results, which contain fields that see the definition of stats below |
The stats object is an object that is structured as follows:
| Field | Type | Description |
|---|---|---|
| updated | number | The number of records that were successfully updated |
Note: The success of an API call does not necessarily mean that the record you want to update has been updated, for example, it is possible to specify that the where filter can only filter out 0 matching records, so you get a situation where the update API call was successful but no records were actually updated, as can be seen by stats.updated
The sample code
Update to-dos to add 10 to-do progress to all outstanding to-dos:
Promise style
const cloud = require('wx-server-sdk')
cloud.init()
const db = cloud.database()
const _ = db.command
exports.main = async (event, context) => {
try {
return await db.collection('todos').where({
done: false
})
.update({
data: {
progress: _.inc(10)
},
})
} catch(e) {
console.error(e)
}
}